import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.URL;
import com.sun.org.apache.xerces.internal.impl.dv.util.Base64;

/*
* Java - Beispiel zur Ansteuerung des XML-Dienstes der egeko-Auftrags-Schnittstelle (kurz: 'v2-order')
*
*/
public final class XmlAdapter {  
    private final String userAuth;

    /**
    * URL zum Dienst
    */
    private static final String SERVICE_ENDPOINT = "https://ws.optadata.com/egeko-service-order-v2/xmlservice"

 public XmlAdapter(String userName, String password) {
        userAuth = new String(Base64.encode((userName + ":" + password).getBytes())).trim();
    }

    public final String sendXml(String requestString) throws IOException {
        HttpURLConnection connection = (HttpURLConnection) new URL(SERVICE_ENDPOINT).openConnection();
        connection.setRequestMethod("POST");
        connection.setRequestProperty("Authorization", "BASIC " + userAuth.trim());
        connection.setDoOutput(true);
        connection.setDoInput(true);
        connection.connect();
        OutputStream out = connection.getOutputStream();
        out.write(requestString.getBytes());
        out.flush();
        int response = connection.getResponseCode();
        try {
            if (response == HttpURLConnection.HTTP_OK) {
                InputStream in = connection.getInputStream();
                ByteArrayOutputStream stringWriter = new ByteArrayOutputStream();
                int b;
                while ((b = in.read()) != -1) {
                    stringWriter.write((char) b);
                }
                String responseText = new String(stringWriter.toByteArray());
                responseText = responseText.trim();
                return responseText;
            } else {
                InputStream in = connection.getErrorStream();
                ByteArrayOutputStream stringWriter = new ByteArrayOutputStream();
                int b;
                while ((b = in.read()) != -1) {
                    stringWriter.write((char) b);
                }
                String responseText = new String(stringWriter.toByteArray());
                return responseText;
            }
        } finally {
            connection.disconnect();
        }
    }
}